Comparative Susceptibility of Atlantic (Salmo salar) and Coho (Oncorhynchus kisutch) Salmon to Three Strains ofVibrio anguillarum From The Maine – New Hampshire Coast

1979 ◽  
Vol 36 (3) ◽  
pp. 280-282 ◽  
Author(s):  
Evelyn S. Sawyer ◽  
Richard G. Strout ◽  
Bonita A. Coutermarsh
Keyword(s):  
Atlantic Salmon ◽  
Key Words ◽  
Salmo Salar ◽  
New Hampshire ◽  
Marine Bacteria ◽  
Coho Salmon ◽  
Vibrio Anguillarum ◽  
Oncorhynchus Kisutch ◽  
Comparative Susceptibility ◽  
Water Transmission

Atlantic salmon (Salmo salar) were found to be as susceptible as coho salmon (Oncorhynchus kisutch) to Maine–New Hampshire strains of Vibrio anguillarum used in both injection and water transmission exposure. Exposure to 1–2.5 × 105 organisms/mL of one strain (569) in the water for 1 h killed 80–100% of Atlantic salmon at 10 and 15 °C. Should similar water exposure conditions occur in Maine estuaries, newly released Atlantic salmon smolts may encounter lethal levels of V. anguillarum. Key words: Vibrio anguillarum, Salmo salar, Atlantic salmon, susceptibility, marine bacteria.

Leaping Behavior of Juvenile Coho (Oncorhynchus kisutch) and Atlantic Salmon (Salmo salar)

1978 ◽  
Vol 35 (6) ◽  
pp. 907-909 ◽  
Author(s):  
Philip E. K. Symons
Keyword(s):  
Atlantic Salmon ◽  
Key Words ◽  
Freshwater Fish ◽  
Salmo Salar ◽  
Environmental Conditions ◽  
Temperature Effects ◽  
Species Differences ◽  
Oncorhynchus Kisutch ◽  
Atlantic Salmon Salmo Salar ◽  
Key Words Fish

Juveniles of coho (Oncorhynchus kisutch) and Atlantic salmon (Salmo salar) proved capable of leaping falls at least 5 body lengths in height. No species differences were apparent: both species leapt lower falls (12 cm) more readily than higher ones (27 and 57 cm) and proportionately more leaps occurred on days with temperatures between 14.0 and 17.0 °C than on days with lower temperatures. Key words: fish, freshwater fish, behavior, migrations, environmental conditions, temperature effects

Ectoparasite Caligus rogercresseyi modifies the lactate response in Atlantic salmon ( Salmo salar ) and Coho salmon ( Oncorhynchus kisutch )

2017 ◽  
Vol 243 ◽  
pp. 6-11 ◽  
Author(s):  
L. Vargas-Chacoff ◽  
J.L.P. Muñoz ◽  
C. Hawes ◽  
R. Oyarzún ◽  
J.P. Pontigo ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Atlantic Salmon Salmo Salar

Feeding by Hatchery-Reared and Wild Atlantic Salmon (Salmo salar) Parr in Streams

1979 ◽  
Vol 36 (11) ◽  
pp. 1408-1412 ◽  
Author(s):  
A. J. Sosiak ◽  
R. G. Randall ◽  
J. A. McKenzie
Keyword(s):  
Atlantic Salmon ◽  
Key Words ◽  
Salmo Salar ◽  
Food Selection ◽  
Stomach Contents ◽  
Stomach Fullness ◽  
Size Dependent ◽  
Atlantic Salmon Salmo Salar ◽  
Feeding Experience ◽  
Salmon Parr

Hatchery-reared Atlantic salmon (Salmo salar) parr were captured 1–3 mo after release in streams, along with wild parr from the same streams. Identification of their stomach contents showed total number of organisms and number of taxa per stomach were greater and there was a higher index of stomach fullness in wild than in hatchery parr resident ≤ 2 mo in a stream. Wild parr consumed more Brachycentridae, Hydroptilidae, Diptera, and Plecoptera than did hatchery parr, but sometimes less Odontoceridae and Heptageniidae. These differences may have arisen from size-dependent food selection, the effects of feeding experience, or possible microhabitat differences between wild and hatchery parr. Key words: salmon parr, hatchery-reared, wild, feeding

Effects of Early Rearing Environment on Stress Response, Immune Function, and Disease Resistance in Juvenile Coho (Oncorhynchus kisutch) and Chinook Salmon (O.tshawytscha)

1993 ◽  
Vol 50 (4) ◽  
pp. 759-766 ◽  
Author(s):  
Kira Salonius ◽  
George K. Iwama
Keyword(s):  
Disease Resistance ◽  
Chinook Salmon ◽  
Coho Salmon ◽  
Vibrio Anguillarum ◽  
Oncorhynchus Kisutch ◽  
Significant Rise ◽  
Wild Fish ◽  
Handling Stress ◽  
Hatchery Fish ◽  
Natural Water Body

Coho (Oncorhynchus kisutch) and chinook salmon (0. tshawytscha) from aquaculture and wild environments were subjected to handling (30–60 s of netting and aerial emersion) and disease challenges. Plasma cortisol concentrations ([cortisol]pl) in both coho and chinook salmon from wild environments were significantly elevated 4 h after handling. Colonized coho salmon (hatchery-reared fish, transported into a natural water body as fry) responded in a similar fashion to wild fish, while those reared entirely in the hatchery showed no significant rise in [cortisol]pl. The responses to handling stress were retained in wild and colonized coho salmon after 7 mo of hatchery rearing. A transient increase in the leukocyte to red blood cell ratio in both wild and hatchery-reared chinook salmon occurred 4 h after handling. Handling signficantly decreased the antibody-producing cell (APC) number in wild fish and elevated their [cortisol]plrelative to hatchery fish. Wild fish had the highest APC number among the three groups before the handling. No difference in resistance to Vibrio anguillarum was apparent in coho and chinook salmon among the different rearing environments, although chinook salmon were generally more susceptible; disease resistance was reduced in wild coho salmon after 7 mo of rearing in a hatchery.

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